Heater



FIG. 1 is a first isometric view of a heater;

FIG. 2 is a second isometric view of the heater of FIG. 1;

FIG. 3 is a third isometric view of the heater of FIG. 1;

FIG. 4 is a fourth isometric view of the heater of FIG. 1;

FIG. 5 is a first end view of the heater of FIG. 1;

FIG. 6 is a second end view of the heater of FIG. 1;

FIG. 7 is a first side elevation view of the heater of FIG. 1;

FIG. 8 is a second side elevation view of the heater of FIG. 1; and,

FIG. 9 is a top plan view of the heater of FIG. 1.

The broken lines shown in the drawings are for the purpose of illustrating portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a heater, as shown and described. 